BPG致力于知识的发现和传播
Total Visits of This Article
2021 | 总访问次数
排名 国家/地区 数量 占比
1 China 169 51.7%
2 United States 77 23.5%
3 Germany 37 11.3%
4 Taiwan 17 5.2%
5 Korea, Republic of 6 1.8%
6 Hong Kong 5 1.5%
7 Netherlands 4 1.2%
8 Russia 3 0.9%
9 Singapore 2 0.6%
10 United Kingdom 2 0.6%
11 Macao 2 0.6%
12 Finland 2 0.6%
13 Peru 1 0.3%